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@inproceedings{delia:ipac2021-mopab332,
author = {A. D’Elia and J. Jacob and V. Serrière and X.W. Zhu},
title = {{Design of 4th Harmonic RF Cavities for ESRF-EBS}},
booktitle = {Proc. IPAC'21},
pages = {1031--1033},
eid = {MOPAB332},
language = {english},
keywords = {HOM, cavity, SRF, impedance, coupling},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-MOPAB332},
url = {https://jacow.org/ipac2021/papers/mopab332.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-MOPAB332},
abstract = {{An active 4th harmonic RF system for bunch lengthening is under study at the ESRF to improve the performance of the new EBS storage ring, mainly for few bunch operation with high currents per bunch, by reducing Touschek and intrabeam scattering, thereby increasing the lifetime and limiting the emittance growth. It will also reduce impedance heating of the vacuum chambers. The 4th Harmonic 1.41 GHz normal conducting cavity design takes inspiration from the KEK idea of using a TM020 mode exhibiting a reduced R/Q but a higher unloaded Q with respect to TM010. We propose to use multicell cavities for their compactness, the reduced number of required ancillaries and the ease of control for a reduced number of cavities. The drawback is the complexity of the model and the necessity to damp the lower order TM010 mode (LOM) as well as the higher order modes (HOM). The RF design of a 4th harmonic multicell damped cavity will be presented.}},
}